Junction City is a city in and the county seat of Geary County, Kansas, United States. As of the 2010 census, the city population was 23,353. Fort Riley, a major U.S. Army post, is nearby.
Junction City is so named from its position at the confluence of the Smoky Hill and Republican rivers, which forms the Kansas River.
In 1854, Andrew J. Mead of New York of the Cincinnati-Manhattan Company, Free Staters connected to the Massachusetts Emigrant Aid Company planned a community there called Manhattan (there was also a discussion to call it New Cincinnati). When the steamship Hartford delivering the immigrants could not reach the community because of low water on the Kansas River, the Free Staters settled 20 miles east in what today is Manhattan, Kansas. The community was renamed Millard City for Captain Millard of the Hartford on October 3, 1855. It was renamed briefly Humboldt in 1857 by local farmers and renamed again later that year to Junction City. It was formally incorporated in 1859.
In 1923, John R. Brinkley established Radio Station KFKB (which stood for ‘’Kansas First, Kansas Best’’) using a 1 kW transmitter. It is one of the first—if not the very first—radio stations in Kansas. Brinkley used the station to espouse his belief that goat testicles could be implanted in men to enhance their virility.
Among Junction City's residents is film director Kevin Wilmott, whose movies, including Ninth Street, are set in Junction City.